Double glass sash



Feb. 11, 194L Q M, VERHAGEN 2,231,514

' DOUBLE GLASS sAsH Filed June l5, 1959 a1000-WA INVENTOR.

ATTORNEYS.

Patented Feb. 11, l19u41 PATENT OFFICE.

DOUBLE GLASS SASH Christian-M. Verhagem-Elkhart, Ind., assignor to The Adlake Company, Chicago, Ill., a corporation of Illinois Application June 15, 1939, Serial No. 279,256

3 Claims. (Cl. 18S-64) This invention has to do with double glass sash of the type in which the air cell between the panes of glass is vented to permit equalization of pressure during atmospheric changes.

The principal object of the invention is to provide improved venting means which can be easily and inexpensively incorporated in a double glass sash, will thoroughly filter any incoming air, and will accurately control the rate at which the ai-r is permitted to enter and leave.

'I'he improved venting means preferably consists of a short length of ceramic rod which is in` serted in a small hole provided in a soft rubber sealing strip located between the panes. The ceramic rod, because of its very slight porosity, acts as a breathing device for the air cell between the panes while preventing the entry of any great amount of air andwholly excluding the entry of any undesirable matter.

While the foregoing statements are indicative of the nature of the invention, other more specific objects and advantages will be apparent to those skilled in the art-upon a full understanding of the improved breather.

In the accompanying drawing:

Fig.- 1 is a face view of a double glass sash equipped with the improvement of the invention;

Fig. 2 is a vertical section through the sash, takenon the line 2--2 of Fig. l, showing the sash mounted in a car window opening;

Fig. 3 is a transverse section through one side of the sash, taken on the line 3-3 of Fig. 1; and

Fig. 4 is a perspective view of the ceramic insert `which constitutes the vair filtering and control means The sash shown in the drawing consists of two panes I of glass, a metal frame II,- and a soft rubber glazingstrip I2. 'Ihe strip I2 spans the edges of both panes in air-tight engagement with the same and is removably seated in the frame.

The strip I2 is provided on its inside with a centrally located rib I3 which uniformly spaces the panes, is provided on its outside with a centrally located rib I4 which fits within an inwardly opening groove I5 in the frame, and is provided along its sides with relatively thin flexible flaps I6 which resiliently hold the panes against the rib I4 and are detachably interlocked with the frame by being tucked into inwardly opening grooves I'I in the latter.v While this form of rubber glazing strip permits quick removal of either pane and may therefore be used to advantage,

other forms of rubber glazing strips which include merely something corresponding to the spacing vrib I3, may be used with good results.

The frame II is provided along the bottom onf the centrally located groove I5 with a plurality of elongated slots I8, which slots extend through to the outside of the frame in communication with a channel I9 surrounding the latter. These slots Iii-which are separated from each other by narrow webs e-serve to materially reduce heat conduction through the frame, and one of the slots also serves as an opening through the frame for the passage of air to and from the hereinafter described breather. While the employment of a number of the slots is desirable in order to reduce heat conduction, it will of course be appreciated that only one of the slots is needed so far as the breather itself is concerned. A

The breather consists of a short rod-like piece 2I of hard ne slightly porous material-preferably ceramic material. This rod may be of any desired cross-section but is preferably of oval crosssection. A small hole 22 is cut or otherwise formed in the' spacing rib I3 of the soft rubber strip I2', from the inside of the strip to the out- `the tendency of the soft rubber to resiliently constrict the same will hold the rod frictionally against displacement.

The sash is shown in Figs. 2 and 3 mounted in a windowA opening of an air-conditioned railway car. One faceof the sash is sealed against the exterior plating 23 of the car by packing 24, and the top, bottom and side rails of the sash are attached respectively to' the header, sill and side post members of the opening by angle strips 25, forming of the outwardly opening chamber I9 in the sash a boxed-in chamber 26 which extends completely about the sash. 'I'his chamber, with which the air cell betweenl the panes I0 is vented by the breather 2|, may be in turn vented to the atmosphere by one or more small holes in the plating 23, although the addition ofsuch holes is not essential in view o f the fact that a certain amount of air will always iind its way into the chamber.

By utilizing a breathing device in the form of a hard rod-like member forced into a hole in a resiliently yieldable member, a uniform degree of porosity is vassured without any danger of overpacking or under-packing of the ltering medium,

screens are required, the filtering element can be easily changed whenever there is occasion for the same, and practically no expense is involved in making and installing the device. The material of the rod, furthermore, may be of such character v as to dehydrate any air passing through the same, thereby avoiding condensation of moisture within the air cell between the panes.

I claim:

1. In a double glass sash, two panes of glass which are spaced apart to provide an air cell between the same, a frame about the panes having an air passage adjacent the air cell, asoft rubber strip which seals oif the air cell between the panes, and a ceramic breathing element which is carried by the rubber strip independently of the frame in aA closely fitting hole formed in the strip and extends fromthe inside of the strip to the outside of the same in communication at the outside with the air passage in the frame.

2. In a double glass sash, two panes ofV glass which are spaced apart to provide an air cell between the same, a frame about the panes having an air passage adjacent the air cell,` a soft rubber strip which seals oi the air cell between the panes, and a short rod of hard slightly porous material which is carried by the rubber strip independently of the frame in a closely titting hole formed in the strip and extends from the inside of the strip to the outside of the same in com- -munication at the outside with the air passage in the frame.

. 3. In a double glass sash, two panes of glass vwhich are spaced apart to. provide an air cell between the same, a metal frame about the panes frame in a closely tting hole formed in the center portion in register with one of the slots in the frame. v

CHRISTIAN M. VERHAGEN. 

